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Extended-Braking-Stiffness Estimation Under Varying Road-Adherence Conditions

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Academic year: 2021

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Figure

Fig. 1. Measurement and offline fitting of the friction characteristics of the tyre-in-the-loop test rig
Fig. 2. Wheel slip measured during an experiment at 65 km/h. A five-phase hybrid ABS algorithm is active between t = 3.85 s and t = 7.27 s.
Fig. 4. Real vs estimated XBS. The switched adaptive observer exhibits an overall better performance than the augmented-state observer of [10].
Fig. 7. Vertical load in the front and rear axles during an ABS braking scenario. The dotted lines correspond to the values of F z f and F z r computed using (29) that are used in the implementation of the observer.
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